Search

Your search keyword '"Jiemei, Ma"' showing total 2 results
Start Over Author "Jiemei, Ma" Topic coherent
2 results on '"Jiemei, Ma"'

1. Applicability of the Welch method for examining self-noise level parameters for broadband seismometers

Author

Xiaojun Li, Dake Yang, Jianbo Xie, Jiemei Ma, Songyong Yuan, Weiwei Xu, Jianhe Zhao, and Dongsheng Li

Subjects
Self-noise, Seismometer, Welch method, Applicability, Coherent, Parameter combinations, Overlap rate, Window function, Geodesy, QB275-343, Geophysics. Cosmic physics, QC801-809
Abstract

Seismometer self-noise levels were determined using Sleeman's three-sensor method in combination with the Welch method for different parameter combinations. The self-noise levels decreased with the increasing segment window length, which is equivalent to the subwindow length, and with the increasing segment overlap rate for different frequency points at a fixed band. After the statistical examination of 9800 different parameter combinations, a zone of reasonable self-noise calculation parameter combinations was identified. Reasons for the unsuitability of certain parameter combinations were explored with respect to their distortion of the seismometer's self-noise levels.

Published
2015
Full Text
View/download PDF

2. Applicability of the Welch method for examining self-noise level parameters for broadband seismometers

Author

Jianhe Zhao, Dongsheng Li, Dake Yang, Songyong Yuan, Xiaojun Li, Weiwei Xu, Jiemei Ma, and Jianbo Xie

Subjects
Seismometer, Self noise, lcsh:QB275-343, Welch method, Applicability, Welch's method, Computer science, Acoustics, Speech recognition, lcsh:Geodesy, lcsh:QC801-809, Window (computing), Window function, lcsh:Geophysics. Cosmic physics, Geophysics, Self-noise, Distortion, Broadband, Overlap rate, Parameter combinations, Computers in Earth Sciences, Coherent, Earth-Surface Processes
Abstract

Seismometer self-noise levels were determined using Sleeman's three-sensor method in combination with the Welch method for different parameter combinations. The self-noise levels decreased with the increasing segment window length, which is equivalent to the subwindow length, and with the increasing segment overlap rate for different frequency points at a fixed band. After the statistical examination of 9800 different parameter combinations, a zone of reasonable self-noise calculation parameter combinations was identified. Reasons for the unsuitability of certain parameter combinations were explored with respect to their distortion of the seismometer's self-noise levels.

Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results